bindings: Supports reentrance to ScriptWrappable::wrap through V8DOMWrapper::createWrapper.

Source/core/dom/DOMDataView.cpp

Index: Source/core/dom/DOMDataView.cpp
diff --git a/Source/core/dom/DOMDataView.cpp b/Source/core/dom/DOMDataView.cpp
index 4398e8ce97c6a7c40db9de7c0ef8f36e84354e80..995d5fd00192fa1d40ebca680eb129dae918ce76 100644
--- a/Source/core/dom/DOMDataView.cpp
+++ b/Source/core/dom/DOMDataView.cpp
@@ -71,6 +71,12 @@ v8::Local<v8::Object> DOMDataView::wrap(v8::Isolate* isolate, v8::Local<v8::Obje
     ASSERT(v8Buffer->IsArrayBuffer());
 
     v8::Local<v8::Object> wrapper = v8::DataView::New(v8Buffer.As<v8::ArrayBuffer>(), byteOffset(), byteLength());
+    // V8::DataView::New may run an arbitrary script and it may result in
+    // creating a new wrapper and associating it with |this|.  If so, the
+    // wrapper already created and associated must be used.
+    v8::Local<v8::Object> associatedWrapper = DOMDataStore::getWrapper(this, isolate);
+    if (UNLIKELY(!associatedWrapper.IsEmpty()))
+        return associatedWrapper;
 
     return associateWithWrapper(isolate, wrapperTypeInfo, wrapper);
 }